#include <iostream>
#include <map>

using namespace std;

voit TestMap() {
    map<char, int> mymap;
    map<char, int>::iterator it(mymap.begin());

    mymap['a'] = 10;
    mymap['b'] = 20;
    mymap['c'] = 30;
    mymap['d'] = 40;
    mymap['e'] = 50;
    mymap['f'] = 70;

    it = mymap.find('a');
    mymap.erase(it);

    for (; it != mymap.end(); ++it) {
        cout << (*it).first << "=>" << (*it).second << endl;
    }
}

int main() {
    TestMap();
}
